Passengers line up for a security check at Pudong International …

AP FILE PHOTO, JAN. 20, 2012 | published: July 8, 2014

Passengers line up for a security check at Pudong International Airport in Shanghai, China. The Transportation Security Administration is requiring passengers at some overseas airports that offer U.S.-bound flights to power on their electronic devices, the agency said Sunday. American intelligence officials have been concerned about new al-Qaida efforts to produce a bomb that would go undetected through airport security.